in a reversal says he will sign the bill into law as soon as it hits his desk. in michigan yesterday, president obama said the law was politically driven. susan mcginnis is in washington with details. good morning to you. >> reporter: good morning. yeah, the governor now says he wants the economic boost that the law would bring, the jobs and the companies that would locate there, but many disagree. workers say it's going to push down their pay and benefits and weaken unions. police stand shoulder to shoulder preparing for as many as 10,000 protesters at the michigan state capitol today. >> people have a constitutional right to demonstrate. however, all we ask is that they do it in an orderly, lawful, and civil manner. >> reporter: state legislators vote this morning on a right-to-work bill that would weaken unions. opponents acknowledge they're powerless to stop it. >> at the end of the day they'll be passed and signed by the governor. that doesn't make it right. >> reporter: the bill means michigan workers would no longer have to pay the union fees for negotiating contracts and other services.